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From: "J.A. Magallón" <jamagallon@ono.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>,
	Jeff Garzik <jeff@garzik.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: somebody dropped a (warning) bomb
Date: Thu, 8 Feb 2007 22:13:17 +0100	[thread overview]
Message-ID: <20070208221317.5beedaeb@werewolf-wl> (raw)
In-Reply-To: <Pine.LNX.4.64.0702081145470.8424@woody.linux-foundation.org>

On Thu, 8 Feb 2007 11:53:38 -0800 (PST), Linus Torvalds <torvalds@linux-foundation.org> wrote:

> 
> 
> On Thu, 8 Feb 2007, Jan Engelhardt wrote:
> > 
> > I generally have to agree with you about the unsigned char* vs char*. It 
> > is a problem of the C language that char can be signed and unsigned, and 
> > that people, as a result, have used it for storing 
> > "shorter_than_short_t"s.
> > 
> > What C needs is a distinction between char and int8_t, rendering "char" 
> > an unsigned at all times basically and making "unsigned char" and 
> > "signed char" illegal types in turn.
> 
> No, it's really more fundamental than that.
> 
> Exactly because "char *" doesn't have a defined sign, only a TOTALLY 
> INCOMPETENT compiler will warn about its signedness.
> 

Perhaps the problem is that gcc warns you something like 'if you care
anything about the sign behaviour of what you send to strlen() you're doomed'.
Ie, you declared the var unsigned, so you care about it. But I can do
anything without any regard to the sign.

--
J.A. Magallon <jamagallon()ono!com>     \               Software is like sex:
                                         \         It's better when it's free
Mandriva Linux release 2007.1 (Cooker) for i586
Linux 2.6.19-jam06 (gcc 4.1.2 20070115 (prerelease) (4.1.2-0.20070115.1mdv2007.1)) #1 SMP PREEMPT

  parent reply	other threads:[~2007-02-08 21:13 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-08 15:00 Jeff Garzik
2007-02-08 16:33 ` Linus Torvalds
2007-02-08 18:42   ` Jan Engelhardt
2007-02-08 19:53     ` Linus Torvalds
2007-02-08 21:10       ` Jan Engelhardt
2007-02-08 21:37         ` Linus Torvalds
2007-02-08 23:12           ` David Rientjes
2007-02-08 23:37             ` Linus Torvalds
2007-02-09  0:24               ` David Rientjes
2007-02-09  0:42                 ` Linus Torvalds
2007-02-09  0:59                   ` Linus Torvalds
2007-02-09  0:59                   ` David Rientjes
2007-02-09  1:11                     ` Linus Torvalds
2007-02-09  1:18                       ` David Rientjes
2007-02-09 15:38                         ` Linus Torvalds
2007-02-09  3:27                   ` D. Hazelton
2007-02-09 19:54                     ` Pete Zaitcev
2007-02-09 12:34                   ` Jan Engelhardt
2007-02-09 13:16                     ` linux-os (Dick Johnson)
2007-02-09 17:45                       ` Jan Engelhardt
2007-02-09 20:29                         ` linux-os (Dick Johnson)
2007-02-09 22:05                           ` Jan Engelhardt
2007-02-09 22:58                             ` Martin Mares
2007-02-12 18:50                             ` linux-os (Dick Johnson)
2007-02-13 15:14                     ` Dick Streefland
2007-02-08 21:13       ` J.A. Magallón [this message]
2007-02-08 21:42         ` Linus Torvalds
2007-02-08 22:03           ` Linus Torvalds
2007-02-08 22:19             ` Willy Tarreau
2007-02-09  0:03             ` J.A. Magallón
2007-02-09  0:22               ` Linus Torvalds
2007-02-09 12:38             ` Sergei Organov
2007-02-09 15:58               ` Linus Torvalds
2007-02-12 11:12                 ` Sergei Organov
2007-02-12 16:26                   ` Linus Torvalds
2007-02-13 18:06                     ` Sergei Organov
2007-02-13 18:26                       ` Pekka Enberg
2007-02-13 19:14                         ` Sergei Organov
2007-02-13 19:43                           ` Pekka Enberg
2007-02-13 20:29                             ` Sergei Organov
2007-02-13 21:31                               ` Jeff Garzik
2007-02-13 23:21                               ` Linus Torvalds
2007-02-15 13:20                                 ` Sergei Organov
2007-02-15 15:57                                   ` Linus Torvalds
2007-02-15 18:53                                     ` Sergei Organov
2007-02-15 19:02                                       ` Linus Torvalds
2007-02-15 20:23                                         ` me, not " Oleg Verych
2007-02-16  4:26                                         ` Rene Herman
2007-02-19 11:58                                           ` Sergei Organov
2007-02-19 13:58                                         ` Sergei Organov
2007-02-15 22:32                                     ` Lennart Sorensen
2007-02-13 19:25                       ` Linus Torvalds
2007-02-13 19:59                         ` Sergei Organov
2007-02-13 20:24                           ` Linus Torvalds
2007-02-15 15:15                             ` Sergei Organov
2007-02-13 21:13                         ` Rob Landley
2007-02-13 22:21                       ` Olivier Galibert
2007-02-14 12:52                         ` Sergei Organov
2007-02-15 20:06                         ` Sergei Organov
2007-02-09 15:10     ` Sergei Organov
2007-02-08 16:35 ` Kumar Gala
     [not found] <7Mj5f-3oz-21@gated-at.bofh.it>
     [not found] ` <7MktH-5EW-35@gated-at.bofh.it>
     [not found]   ` <7Mmvy-vj-17@gated-at.bofh.it>
     [not found]     ` <7MnBC-2fk-13@gated-at.bofh.it>
     [not found]       ` <7MoQx-4p8-11@gated-at.bofh.it>
     [not found]         ` <7MpjE-50z-7@gated-at.bofh.it>
     [not found]           ` <7MpCS-5Fe-9@gated-at.bofh.it>
     [not found]             ` <7MDd7-17w-1@gated-at.bofh.it>
     [not found]               ` <7MGkB-62k-31@gated-at.bofh.it>
     [not found]                 ` <7NHoe-2Mb-37@gated-at.bofh.it>
     [not found]                   ` <7NMe9-1ZN-7@gated-at.bofh.it>
     [not found]                     ` <7Oagl-6bO-1@gated-at.bofh.it>
     [not found]                       ` <7ObvW-89N-23@gated-at.bofh.it>
     [not found]                         ` <7Oc8t-NS-1@gated-at.bofh.it>
2007-02-15 20:08                           ` Bodo Eggert
2007-02-16 11:21                             ` Sergei Organov
2007-02-16 14:51                               ` Bodo Eggert
2007-02-19 11:56                                 ` Sergei Organov
2007-02-16 12:46                             ` Sergei Organov
2007-02-16 17:40                               ` Bodo Eggert
2007-02-19 12:17                                 ` Sergei Organov

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